Oni

Oni are evil spirits that take humanoid form to become native outsiders.
Grafts: Oni gain the humanoid subtype graft of the race associated with their physical form. For example, a ja noi oni takes the form of a hobgoblin and therefore gains the GOBLINOID subtype graft, even though it is not a humanoid or a member of the hobgoblin race. Oni also gain the shapechanger subtype graft, with their change shape ability generally limited to humanoids of similar size.
Traits: Darkvision 60 ft., low-light vision, regeneration (suppressed by acid or fire).